Cooking purification device and cooking utensil

Abstract

The invention discloses a cooking purification device and a cooking utensil, and belongs to the technical field of cooking purification. The cooking purification device comprises a main body part and a purification pore channel structure, the main body part is provided with at least one passing opening, the purification pore channel structure is connected to the main body part and provided with a purification pore channel communicating with the passing opening, and the end, away from the passing opening, of the purification pore channel is closed. At least part of the purification pore channel structure is of a micropore structure, and the micropore structure is communicated with the passing opening; therefore, cooking oil fume gas can be prevented from directly penetrating through the purification pore channel and is forced to pass through the micropore structure, so that oil fume grease pollutants in the cooking gas can be intercepted and adsorbed by utilizing the micropore structure, and the effect of purifying the cooking oil fume gas is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of cooking purification, and in particular, to a cooking purification device and a cooking appliance. Background Art

[0002] In recent years, with the rapid economic development of our country and the continuous improvement of residents' living standards, consumers' demand for household cooking appliances has become increasingly strong. In particular, the popularization and use of a variety of kitchen appliances with different functions have satisfied the wishes of the majority of residents to cook easily at home and enjoy delicious food. However, similar to traditional large kitchen appliances, kitchen appliances also generate cooking gases containing a large amount of oil fume and grease molecules during the cooking process, including air pollutants such as VOCs, particulate matter, and odors. These cooking gases are directly discharged into the kitchen environment, which will pollute the indoor air. Secondly, the cooking gases circulating in the cooking cavity will cause the accumulation of oil fume and grease in the cavity, making it difficult to clean the kitchen appliances and breeding bacteria over time. Long-term exposure to the environment of oil fume emissions and bacterial contamination threatens people's physical health. Therefore, it is urgent to improve and optimize the exhaust module of kitchen appliances. Summary of the Invention

[0003] The present application provides a cooking purification device and a cooking appliance, which solve the technical problem that cooking appliances are prone to generate oil fume and grease pollutant gases, pollute the air, and threaten people's physical health.

[0004] To achieve the above object, in the first aspect of the present application, a cooking purification device is provided, and the cooking purification device includes:

[0005] A main body part, the main body part is provided with at least one through hole; and

[0006] A purification pore structure, the purification pore structure is connected to the main body part and is provided with a purification pore communicating with the through hole, one end of the purification pore far from the through hole is closed, and at least part of the purification pore structure is a microporous structure, and the microporous structure communicates with the through hole.

[0007] In some embodiments of the present application, a plurality of the purification pore structures are arranged in parallel.

[0008] In some embodiments of the present application, the purification pore structure is loaded with a catalyst;

[0009] And / or, at least part of the surface of the purification pore structure is coated with a catalytic coating, and the catalytic coating includes a catalyst;

[0010] And / or, the inner wall surface of the pores of the microporous structure is coated with a catalytic coating.

[0011] In some embodiments of the present application, the purification channel structure includes a side wall and a bottom wall, and the side wall and the bottom wall enclose to form the purification channel.

[0012] In some embodiments of the present application, the microporous structure is provided on the side wall;

[0013] and / or, the microporous structure is provided on the bottom wall.

[0014] In some embodiments of the present application, the microporous structure is provided on the side wall, and the bottom wall is a baffle structure;

[0015] and / or, the microporous structure is provided on the bottom wall, and the side wall is a baffle structure.

[0016] In some embodiments of the present application, the bottom wall is an arc structure, or the bottom wall is a straight plate structure.

[0017] In some embodiments of the present application, the purification channel structure is made of a high-temperature resistant material, including at least one of ceramics, metals, and polymer materials.

[0018] In some embodiments of the present application, the ceramics include at least one of cordierite, silicon carbide, kaolin, alumina, and silica;

[0019] and / or, the metals include at least one of aluminum, titanium, nickel, copper, and stainless steel.

[0020] In some embodiments of the present application, the porosity of the microporous structure is 10% to 80%;

[0021] and / or, the average pore diameter of the microporous structure is 1 μm to 1000 μm.

[0022] In some embodiments of the present application, the porosity of the microporous structure is 20% to 30%;

[0023] and / or, the average pore diameter of the microporous structure is 200 μm to 300 μm.

[0024] In some embodiments of the present application, the shape of the through-opening includes at least one of a triangle, a quadrilateral, a pentagon, a hexagon, an octagon, and a circle.

[0025] In some embodiments of the present application, the radial average diameter of the purification channel is 0.1 mm to 100 mm;

[0026] and / or, the wall thickness of the purification channel structure is 10 μm to 20000 μm.

[0027] In some embodiments of the present application, the radial average diameter of the purification channel is 0.5 mm to 10 mm;

[0028] And / or, the wall thickness of the purification channel structure is 100 μm to 500 μm.

[0029] In some embodiments of the present application, the ratio of the radial average diameter of the purification channel to the wall thickness of the purification channel structure is 1 to 100.

[0030] In some embodiments of the present application, the cooking purification device includes a housing, an air passage is formed in the housing, the purification channel structure is arranged in the air passage, the main body is connected to the housing, and the purification channel structure is arranged in the air passage.

[0031] In some embodiments of the present application, the cooking purification device includes a fan, and the fan is arranged in the air passage;

[0032] And / or, the main body is detachably connected to the housing;

[0033] And / or, the purification channel structure is detachably connected to the main body.

[0034] The second aspect of the present application provides a cooking appliance, the cooking appliance includes a cooking cavity and the cooking purification device as described above, an air outlet is provided in the cooking cavity, and the air outlet is communicated with the air inlet of the cooking purification device.

[0035] In some embodiments of the present application, the cooking appliance includes an exhaust port, and the exhaust port is communicated with the air passage of the cooking purification device.

[0036] In some embodiments of the present application, the cooking appliance includes an air fryer, an electric oven, a pancake griddle or a griddle.

[0037] In some embodiments of the present application, the cooking appliance is an air fryer, a heat convection module is included in the cooking cavity, and the heat convection module includes a driving motor, a wind impeller and a heating component.

[0038] The beneficial effects that the present application can achieve:

[0039] One end of the cooking purification device of the present application is open and the other end is closed, and a microporous structure is provided, whereby the cooking fume gas can be prevented from directly passing through the purification channel, forcing it to pass through the microporous structure, so that the pollutants in the cooking fume gas can be intercepted by the microporous structure, achieving the effect of purifying the cooking fume gas.

[0040] The purification channel structure of this application increases the contact area with cooking fume gas compared to ordinary filter nets, improves the adsorption rate of pollutants, and enhances the purification effect. Further, the setting with one end of the cooking purification device open and the other end closed can also more easily form a pressure difference between the inside and outside of the cooking cavity, thereby promoting the cooking fume gas in the cooking cavity to enter the cooking purification device, be purified, and then discharged.

[0041] The cooking purification device of this application has a simple design, small volume, large dust capacity, is convenient for disassembly, washing, and regeneration, and is strong and durable, which can help improve the cooking environment and air quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following briefly introduces the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0043] Figure 1 It is a schematic structural diagram of a cooking appliance according to an embodiment of this application.

[0044] Figure 2 It is a sectional view of a cooking appliance according to an embodiment of this application.

[0045] Figure 3 It is a sectional view of the purification channel structure according to the first embodiment of this application.

[0046] Figure 4 It is a sectional view of the purification channel structure according to the second embodiment of this application.

[0047] Figure 5 It is a sectional view of the purification channel structure according to the third embodiment of this application.

[0048] Figure 6 It is a sectional view of the purification channel structure according to the fourth embodiment of this application.

[0049] Figure 7 It is a sectional view of the purification channel structure according to the fifth embodiment of this application.

[0050] Figure 8 It is a sectional view of the purification channel structure according to the sixth embodiment of this application.

[0051] Figure 9 It is a schematic diagram of the purification process of cooking fume gas according to an embodiment of this application.

[0052] Figure 10 It is an exploded view of a cooking purification device according to an embodiment of this application.

[0053] Figure 11 This is a schematic structural diagram of a cooking purification device according to an embodiment of the present application.

[0054] The reference numerals in the figure are as follows:

[0055] 100 Cooking appliance 10 Cooking purification device 11 Main body part 111 Passageway 12 Purification duct structure 121 Purification duct 122 Side wall 123 Bottom wall 13 Shell 131 Air passageway 14 Fan 141 Motor 142 Fan blade 20 Cooking cavity 21 Thermal convection module 211 Drive motor 212 Wind impeller 213 Heating component 200 Pollutant

[0056] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0057] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0059] In the present application, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0060] Similar to traditional large kitchen appliances, small kitchen appliances also generate cooking gases containing a large amount of pollutants such as oil fumes and grease during the cooking process, including air pollutants such as VOCs, particulate matter and odors. These cooking gases are directly discharged into the kitchen environment or circulated inside the cooking appliance, which will pollute the indoor air or cause oil accumulation inside the cooking appliance to breed bacteria. Long-term exposure to the oil fume gas and bacteria-polluted environment threatens people's physical health. Therefore, it is urgent to improve and optimize the oil fume exhaust module of kitchen appliances.

[0061] In view of this, the present application provides a cooking purification device 10, and the cooking purification device 10 is applied to a cooking appliance 100.

[0062] Refer to Figures 1 to 9, in some embodiments of the present application, the cooking purification device 10 includes a main body portion 11 and a purification duct structure 12. The main body portion 11 is provided with at least one through port 111. The purification duct structure 12 is connected to the main body portion 11 and is provided with a purification duct 121 communicating with the through port 111. One end of the purification duct 121 away from the through port 111 is closed, and at least a part of the purification duct structure 12 is a microporous structure, and the microporous structure communicates with the through port 111. The cooking fume gas generated in the cooking cavity 20 of the cooking appliance 100 can pass through the through port 111 and enter the purification duct structure 12 of the cooking purification device 10 to be purified.

[0063] Among them, the main body portion 11 may be a plate-like structure, which forms a part of the cavity wall of the cooking cavity 20, or may be a cylindrical structure as Figure 11 shown.

[0064] In the present application, the purification duct structure 12 is designed with one end open and one end closed, and at the same time is provided with a microporous structure. Referring to Figure 3 and Figure 9 , Figure 9 the direction of the arrow in is the flow direction of the cooking fume gas from the cooking cavity 20 to the cooking purification device 10 and passing through the microporous structure on the cooking purification structure 12 and discharging. The cooking fume gas cannot directly pass through the purification duct 121 and discharge, but must pass through the microporous structure on the purification duct structure 12 and discharge. The microporous structure can intercept pollutants 200 with a certain size in the cooking fume gas. Therefore, the purified gas after purification is discharged through the microporous structure by the cooking fume gas. It should be noted that the above pollutants 200 include pollutants particles and oil fume droplets and other substances with a certain size in the cooking fume gas.

[0065] Moreover, the purification duct structure 12 in the present application increases the contact area with the cooking fume pollutants compared with an ordinary filter screen, improves the adsorption rate of the pollutants 200, and is beneficial to enhancing the purification effect.

[0066] In addition, one end of the purification duct 121 away from the through port 111 is closed, making it easier to form a pressure difference between the cooking cavity 20 and the outside of the cooking cavity 20, so as to promote the cooking fume gas in the cooking cavity 20 to pass through the microporous structure and discharge out of the cooking cavity.

[0067] The cooking purification device 10 proposed in this application can be applied to a cooking appliance 100, which includes but is not limited to an air fryer, an electric oven, a pancake griddle, a griddle, and other appliances that generate cooking fume gas during the cooking process. The cooking appliance 100 includes an appliance main body and a cooking purification device 10. At least a cooking cavity 20 is formed inside the main body of the cooking appliance 100. When the cooking purification device 10 is applied to the cooking appliance 100, the through-opening 111 on the main body portion 11 of the cooking purification device 10 can be communicated with the air outlet of the cooking appliance 100, or the main body portion 11 of the cooking purification device 10 can be used as a part of the cavity wall of the cooking cavity 20.

[0068] Continue to refer to Figures 1 to 2 , in some embodiments of the present application, an air outlet is provided in the cooking cavity 20 of the cooking appliance 100, and the air outlet is communicated with the through-opening 111 on the main body portion 11 of the cooking purification device 10. The cooking fume gas generated in the cooking cavity 20 of the cooking appliance 100 can flow out from the air outlet, pass through the through-opening 111, enter the purification pore structure 12, and pass through the microporous structure. During this process, the pollutants 200 in the cooking fume gas are intercepted by the microporous structure to obtain purified gas, and the purified gas passes through the microporous structure and is discharged.

[0069] Continue to refer to Figures 3 to 8 , in some embodiments of the present application, the purification pore structure 12 further includes a side wall 122 and a bottom wall 123, and the side wall 122 and the bottom wall 123 enclose to form a purification pore 121. It should be noted that the microporous structure of the purification pore structure 12 can be opened on the side wall 122 and / or the bottom wall 123. The side wall 122 and / or the bottom wall 123 can be entirely opened with microporous structures, or only partially opened with microporous structures.

[0070] Continue to refer to Figure 3 , in one embodiment, the side wall 122 and the bottom wall 123 of the purification pore structure 12 are both opened with microporous structures. It should be noted that the side wall 122 can be entirely opened with microporous structures, or only partially opened with microporous structures. Similarly, the bottom wall 123 can also be entirely opened with microporous structures, or only partially opened with microporous structures. When only a part of the side wall 122 and / or the bottom wall 123 is opened with microporous structures and the other part is a sealed baffle structure, it is easier to form a pressure difference between the cooking cavity 20 and the outside of the cooking cavity 20, so as to promote the cooking fume gas in the cooking cavity 20 to pass through the microporous structure, be purified, and then discharged.

[0071] Continue to refer to Figure 4, in one embodiment, microporous structures may be formed on the bottom wall 123 of the purification duct structure 12. At the same time, the side wall 122 is a baffle structure that is airtight. The cooking fume gas cannot pass through this baffle structure and can only pass through the microporous structures formed on the bottom wall 123. Thus, the pollutant 200 can be intercepted by the microporous structures on the bottom wall 123, and the baffle structure of the side wall 122 makes it easier to form a pressure difference between the cooking cavity 20 and the outside of the cooking cavity 20, prompting the cooking fume gas to enter the purification duct structure 12 through the through-opening 111, flow through the purification duct 121, and finally be discharged after the pollutant 200 is intercepted by the microporous structures to complete purification. It should be noted that the bottom wall 123 may be entirely provided with microporous structures or only partially provided with microporous structures.

[0072] Continue to refer to Figure 5 , in one embodiment, microporous structures may be formed on the side wall 122 of the purification duct structure 12. At the same time, the bottom wall 123 is a baffle structure that is airtight. The cooking fume gas cannot pass through this baffle structure and can only pass through the microporous structures formed on the side wall 122. Thus, the pollutant particles 200 can be intercepted by the microporous structures on the side wall 122, and the baffle structure of the bottom wall 123 makes it easier to form a pressure difference between the cooking cavity 20 and the outside of the cooking cavity 20, prompting the cooking fume gas to enter the purification duct structure 12 through the through-opening 111, flow through the purification duct 121, and finally be discharged after the pollutant 200 is intercepted by the microporous structures to complete purification. It should be noted that the side wall 122 may be entirely provided with microporous structures or only partially provided with microporous structures.

[0073] This application does not limit the shape of the bottom wall 123 of the purification duct structure 12. Continue to refer to Figure 3 and Figure 6 , in some embodiments, the bottom wall 123 may be a straight plate structure or an arc structure.

[0074] This application does not limit the material for preparing the purification duct structure 12. In some embodiments, the material for preparing the purification duct structure 12 is a high-temperature resistant material, including at least one of ceramics, metals, and polymer materials. The above materials have good durability and high-temperature resistance, and are also easy to clean.

[0075] In some embodiments, the ceramics include at least one of cordierite, silicon carbide, kaolin, alumina, and silica. The above types of ceramics are fire-resistant and high-temperature resistant, and have good weather resistance, which can extend the service life of the product.

[0076] In some embodiments, the metals include at least one of aluminum, titanium, nickel, copper, and stainless steel. The above types of metal materials also have good durability and are easy to clean, which is beneficial for cleaning the oil fume and grease pollutants accumulated over a long time.

[0077] It should be noted that the entire purification channel structure 12 may be made of at least one of the above materials, or a part of the purification channel structure 12 may be made of at least one of the above materials. For example, the part of the purification channel structure 12 having a microporous structure is made of at least one of the above materials, so that the pollutant particles and oil fume droplets intercepted by the microporous structure are easier to clean.

[0078] In some embodiments, the porosity of the microporous structure is 10% to 80%, further 20% to 30%, and may be any value in the range of 10% to 80% such as 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. Based on the above porosity conditions, while a good filtration effect can be obtained, the risk that the air resistance is too large due to too low porosity, the purified gas is difficult to pass through, and the microporous structure is easily blocked by the pollutant 200 can be reduced.

[0079] In some embodiments, the average pore diameter of the microporous structure is 1 μm to 1000 μm, further 200 μm to 300 μm, and may be any value in the range of 1 μm to 1000 μm such as 1 μm, 2 μm, 5 μm, 10 μm, 50 μm, 100 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 500 μm, 600 μm, 700 μm, 750 μm, 800 μm, 850 μm, 900 μm, 930 μm, 950 μm, 1000 μm. Based on the above average pore diameter, the microporous structure can intercept and filter most of the pollutants 200 in the cooking fume gas to achieve a purification effect, and at the same time, it is not easy to have the problem that the microporous structure is easily blocked due to too small pore diameter and the purified gas is difficult to pass through.

[0080] The present application does not limit the shape of the through - opening 111 on the main body 11 of the cooking purification device 10. In some embodiments, the shape of the through - opening 111 includes at least one of a triangle, a quadrilateral, a pentagon, a hexagon, an octagon, and a circle.

[0081] The microporous structure is located on the wall of the purification channel structure 12. Therefore, the wall thickness of the purification channel structure 12 cannot be too thick, otherwise the purified gas may be difficult to discharge. Nor should the wall thickness of the purification channel structure 12 be too thin to prevent the pollutant 200 from passing through the microporous structure and discharging polluted air. Considering comprehensively, in some embodiments, the wall thickness of the purification channel structure 12 is 10 μm to 20,000 μm, further 100 μm to 500 μm. For example, it can be any value within the range of 10 μm to 20,000 μm such as 10 μm, 50 μm, 80 μm, 100 μm, 500 μm, 800 μm, 1000 μm, 3000 μm, 5000 μm, 8000 μm, 9000 μm, 10,000 μm, 15,000 μm, 18,000 μm, 20,000 μm, etc.

[0082] In some embodiments, the radial average diameter of the purification channel 121 is 0.1 mm to 100 mm, further 0.5 mm to 10 mm. It can be any value within the range of 0.1 mm to 100 mm such as 0.1 mm, 0.5 mm, 1 mm, 2 mm, 8 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, etc. Based on the radial average diameter within the above range, the purification channel structure 12 and the cooking fume gas have a large contact area, which can increase the adsorption efficiency of the pollutant 200 in the cooking fume gas and enhance the purification effect.

[0083] The present application does not limit the number of the purification channel structures 12 in the purification device 10. In some embodiments, the cooking purification device 10 includes one or more purification channel structures 12, such as 1, 2, 3, 4, 5, 10, 50, 100, 200, 500, 1000, etc. Arranging multiple purification channel structures 12 is beneficial to increasing the area of the microporous structure and the contact area between the cooking fume gas and the microporous structure, thereby intercepting a large amount of pollutants 200 in the fume gas and achieving a good purification effect.

[0084] In some embodiments, refer to Figures 7 to 9, a plurality of purification channel structures 12 can be arranged in parallel. The direction of the arrow in the figure is the flow direction of cooking fume gas from the cooking cavity 20 to the cooking purification device 10 and passing through the microporous structure of the cooking purification structure 12 to be discharged. Specifically, the cooking fume gas enters the plurality of purification channel structures 12 arranged in parallel from the through-port 111 of the main body 11, passes through the purification channel 121, and passes through the microporous structure provided on the bottom wall 123 and / or the side wall 122. Pollutants 200 with a certain size in the cooking fume gas are intercepted by the microporous structure, thereby completing the purification to obtain purified gas, and the purified gas passes through the microporous structure and is discharged from the cooking cavity 20. The plurality of purification channel structures 12 arranged in parallel can increase the contact area with the cooking fume gas, improve the adsorption rate of the pollutants 200, and achieve the purpose of improving the utilization rate of the purification channel structure 12 and the purification effect.

[0085] In some embodiments, the ratio of the radial average diameter of the purification channel 121 to the wall thickness of the purification channel structure 12 is 0.1 - 1000, preferably 1 - 100. The ratio of the two can be any value in the range of 0.1 - 1000, such as 0.1, 0.5, 1, 2, 8mm, 10, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, etc. The purification channel 121 is set based on the ratio of the radial average diameter and the wall thickness within the above range. The purification channel structure 12 can obtain a larger contact area with the cooking fume gas to fully carry out the catalytic oxidation reaction while ensuring that the wind resistance coefficient meets the conditions of air flow and the pressure difference inside and outside the cooking cavity 20, can increase the adsorption efficiency of the pollutants 200 in the cooking fume gas, and further enhance the purification effect.

[0086] Continue to refer to Figure 2 , Figure 10 and Figure 11 , the cooking purification device 10 further includes a housing 13, and an air passage 131 is formed inside the housing 13. The purification channel structure 12 is arranged in the air passage 131. In this embodiment, the air passage 131 is provided with an air outlet, and the purified gas obtained after the cooking fume gas is purified by the purification channel structure 12 can be discharged to different places through the air passage 131. For example, when the air outlet of the air passage 131 is connected to the cooking cavity 20, the purified gas can flow back to the cooking cavity 20 to realize the internal circulation of the gas; when the air outlet of the air passage 131 is directly connected to the outside of the cooking appliance 100, the purified gas can be discharged into the air.

[0087] In some embodiments, the main body 11 is detachably connected to the housing 13, and the main body 11 is fixed to the cooking appliance 100 through the housing 13. When a relatively large amount of contaminants 200 accumulates on the main body 11, the main body 11 can be removed for cleaning, making the cooking appliance 100 easier to clean, and the components can be replaced and recycled, which is beneficial to extending the service life of the cooking purification device 10 and the cooking appliance 100.

[0088] In some embodiments, the purification duct structure 12 is detachably connected to the main body 11. When a relatively large amount of contaminants 200 accumulates on the purification duct structure 12, the purification duct structure 12 can be removed from the main body 11 for cleaning, making the cooking purification device 10 easier to clean, and the components can be replaced and recycled, which is beneficial to extending the service life of the cooking purification device 10 and the cooking appliance 100.

[0089] Continue to refer to Figure 10 , in an embodiment, the cooking purification device 10 further includes a fan 14, and the fan 14 is disposed in the air passage 131. The fan 14 is disposed on the side of the purification duct structure 12 away from the cooking cavity 20. After being started, the pressure difference between the inside and outside of the cooking cavity 20 can be increased, so as to prompt the cooking fume gas to enter the purification duct structure 12 and be purified and then discharged.

[0090] In this embodiment, the fan 14 includes a motor 141 and a fan blade 142. The arrangement of the motor 141, the fan blade 142 and the purification duct structure 12 is the purification duct structure 12, the fan blade 142 and the motor 141 in sequence. When the fan 14 works, the motor 141 drives the fan blade 142 to rotate, increasing the pressure difference between the inside and outside of the cooking cavity 20, so that the cooking fume gas quickly enters the cooking purification device 12 for purification and then is discharged.

[0091] In this embodiment, the fan blade 141 of the fan 14 is vertically disposed on the air passage 131, whereby the purified gas can be smoothly led to the air passage 131 and discharged through the air passage 131.

[0092] In the present application, the cooking purification device 10 is detachable. When a certain amount of oil and dirt contaminants accumulates on the cooking purification device 10, it can be removed and cleaned and then continue to be used, which is hygienic and convenient, can reduce the harm to human health caused by the accumulation of contaminants, and can also extend the service life of the cooking purification device 10.

[0093] It should be noted that the cooking purification device 10 can be removed as a whole or partially removed.

[0094] In some embodiments, refer to Figure 10, the cooking purification device 10 includes a main body 11 and a purification duct structure 12. The purification duct structure 12 is connected to the main body 11 to form an independent whole. In addition, the cooking purification device 10 further includes a housing 13, and the main body 11 is detachably connected to the housing 13. When the purification duct structure 12 connected to the main body 11 accumulates a large amount of pollutants 200, the main body 11 can be detached from the housing 13 for cleaning, making the cooking appliance 100 easier to clean.

[0095] In this embodiment, continue to refer to Figure 10 and Figure 11 , the cooking purification device 10 further includes a fan 14. The fan 14 includes a motor 141 and a fan blade 142. The motor 141 and the fan blade 142 are detachably mounted on the housing 13. When components such as the motor 141 or the fan blade 142 are damaged or contaminated by pollutants 200, they can be detached separately for replacement or cleaning, thereby improving the easy-cleaning effect and service life of the cooking appliance 100.

[0096] A second aspect of the present application proposes a cooking appliance 100. The cooking appliance 100 includes a cooking cavity 20 and the cooking purification device 10 as described above. The cooking cavity 20 is provided with an air outlet, and the air outlet is communicated with the through port 111 of the cooking purification device 10. The cooking fume gas generated in the cooking cavity 20 can enter the purification duct structure 12 in the cooking purification device 10 through the through port 111 communicated with the air outlet and be purified and then discharged.

[0097] In this embodiment, the specific type of the cooking appliance is not limited, including an air fryer, an electric oven, a pancake griddle or a griddle.

[0098] When the cooking appliance 100 is an air fryer, refer to Figures 1 to 9 , the cooking cavity 20 of the air fryer contains a heat convection module 21. The heat convection module 21 includes a driving motor 211, a wind impeller 212 and a heating component 213. The air outlet of the air fryer is connected to the through port 111 on the main body 11 of the cooking purification device 10. When the air fryer works, the heat convection module 21 is started, the driving motor 211 drives the wind impeller 212 to rotate, generating air flow. The flowing air passes through the heating component 213 and convects with the heat generated by the heating component 213 in the cooking cavity 20 to achieve food cooking. The cooking fume gas generated during the cooking process enters the purification duct structure 12 through the through port 111 communicating with the air outlet.

[0099] The purification duct structure 12 of the air fryer in this embodiment includes a purification duct 121, a side wall 122, and a bottom wall 123, which is designed with one end open and the other end closed. Moreover, microporous structures are provided on the side wall 122 and / or the bottom wall 123. Therefore, the cooking oil fume gas cannot flow directly through the purification duct 121. Instead, under the action of the pressure difference between the inside and outside of the cooking cavity 20, it passes through the above-mentioned microporous structures. Pollutants 200 with a certain size in the cooking oil fume gas will be intercepted by the microporous structures, thereby achieving a purification effect and obtaining purified gas, which passes through the microporous structures and is discharged.

[0100] In this embodiment, when the side wall 122 is provided with a microporous structure, the bottom wall 123 can also be designed as a sealed baffle structure; or, when the bottom wall 123 is provided with a microporous structure, the side wall 122 can also be designed as a sealed baffle structure. Designing a partial baffle structure in the purification duct structure makes it easier to form a pressure difference between the inside and outside of the cooking cavity 20, prompting the cooking oil fume gas to enter the purification duct structure 12 through the through-port 111, flow through the purification duct 121, and finally intercept the pollutants 200 through the microporous structure and complete the purification and discharge.

[0101] In this embodiment, Figure 7 Or Figure 8 Combined Figure 9 With multiple purification duct structures 12 arranged in parallel, the arrow direction in the figure is the flow direction of the cooking oil fume gas from the cooking cavity 20 to the cooking purification device 10 and passing through the microporous structures of the cooking purification structure 12 and being discharged. The cooking oil fume gas enters the purification duct 121 of the multiple parallel purification duct structures 12 from the through-port 111 of the main body 11, and then comes to the microporous structures provided on the bottom wall 123 and / or the side wall 122 of the purification duct structure 12. Pollutants 200 with a certain size in the cooking oil fume gas are intercepted by the microporous structures, thereby completing the purification and obtaining purified gas, and the purified gas passes through the microporous structures and is discharged from the cooking cavity 20. The multiple parallel purification duct structures 12 can perform the processes of multiple adsorption catalysis and multiple penetration filtration on the cooking oil fume gas. Using the purification mode of cyclic adsorption catalysis filtration can greatly increase the contact area with the cooking oil fume gas, improve the adsorption rate of pollutant particles and oil fume droplets, and achieve the purpose of fully improving the utilization rate of the purification duct structure and the purification effect.

[0102] In this embodiment, the cooking and purification device 10 of the air fryer further includes a housing 13. An air passage 131 is formed inside the housing 13, and the purification channel structure 12 is arranged in the air passage 131. The cooking fume gas enters the main body 11 and is purified by the microporous structure of the purification channel structure 12 to obtain purified gas, and the purified gas then flows through the air passage 131. In this embodiment, the air outlet of the air passage 131 can be communicated with the cooking cavity 20, so that the purified gas can flow back to the cooking cavity 20 to realize the internal circulation of the gas. In addition, the air outlet of the air passage 131 can also be directly communicated with the outside of the air fryer, so that the purified gas can be discharged into the air.

[0103] In this embodiment, the cooking and purification device 10 of the air fryer further includes a fan 14, and the fan 14 is arranged in the air passage 131. The fan 14 is arranged on the side of the purification channel structure 12 away from the cooking cavity 20. After being started, it can increase the pressure difference between the inside and outside of the cooking cavity 20, so as to promote the cooking fume gas to enter the cooking and purification device for purification and then be discharged.

[0104] In this embodiment, the housing 13 of the air fryer further includes an exhaust port for discharging gas to the outside. The exhaust port is communicated with the air passage 131 of the cooking and purification device 10. That is to say, the cooking and purification device 10 can form a circulation with the outside world, and sufficient air or oxygen from the outside can intervene in the cooking and purification device 10 to fully carry out the catalytic oxidation reaction, further improving the catalytic efficiency, and the purified gas can be directly discharged into the air.

[0105] In this embodiment, the fan 14 includes an exhaust fan and an exhaust blower. The arrangement order of the exhaust fan, the exhaust blower and the purification channel structure 12 is the purification channel structure 12, the exhaust blower and the exhaust fan. When the fan 14 works, the exhaust fan drives the exhaust blower, thereby increasing the pressure difference between the inside and outside of the cooking cavity 20, so that the cooking fume gas can quickly enter the cooking and purification device 12 for purification and then be discharged.

[0106] In this embodiment, the exhaust blower of the fan 14 is vertically arranged on the air passage 131, so that the purified gas can be introduced into the air passage 131 and discharged through the air passage 131.

[0107] In this embodiment, the fan 14 is a centrifugal fan, which is beneficial to controlling the direction of the purified gas and introducing the purified gas into the air passage 131.

[0108] During the cooking process, an air fryer generates a large amount of cooking fume gas, which includes air pollutants such as VOCs, particulate matter, and odors. When these pollutants are directly discharged into the kitchen environment, they will pollute the indoor air. Prolonged exposure to the environment of cooking fume gas will also pose a threat to people's physical health. When the air fryer is applied with the cooking purification device 10 of the present application, the purification channel structure 12 with one end open and one end closed can cause a pressure difference between the inside and outside of the cooking cavity 20 of the air fryer. Therefore, the cooking fume gas can be forced into the cooking purification device 10. The microporous structure provided on the cooking purification device 10 can intercept the pollutants 200 in the cooking fume gas to obtain purified gas, and the purified gas passes through the microporous structure and is discharged, thereby achieving the purification purpose. In addition, the cooking purification device 10 of the present application is simply designed, small in size, large in dust capacity, easy to disassemble, wash, and regenerate, and is strong and durable. It can achieve efficient oil-free fume purification effect for cooking appliances such as air fryers, and improve the cooking environment and air quality.

[0109] In the present application, a catalytic coating can also be coated on the surface of the cooking purification device 10. The catalytic coating includes a catalyst. The surface of the cooking purification device 10 includes the surfaces that the cooking pollutants 200 can contact, such as the main body part 11 and the purification channel structure 12. The purification channel structure 12 includes a side wall 122 and a bottom wall 123. When the pollutants 200 contact the catalytic coating coated on the surface of the cooking purification device 10, they can be catalytically degraded into carbon dioxide and water by the catalyst, which can reduce the pollution of the cooking purification device 10 by oil stains, prevent the accumulation of oil stains from blocking the microporous structure, and is beneficial to extending the service life of the cooking purification device.

[0110] In the present application, the cooking fume gas enters the purification channel structure 12 under the pressure difference between the inside and outside of the cooking cavity 20 and is purified, leaving behind pollutants 200. In some embodiments, the microporous structure is loaded with a catalyst and at least partially exposed to the air. Thus, the pollutants 200 adsorbed by the microporous structure, such as cooking oil and grease molecules, can be catalytically degraded in a timely manner, preventing the accumulation of pollutants 200 from blocking the microporous structure and further improving the catalytic degradation efficiency of the cooking fume gas.

[0111] In some embodiments, the purification channel structure 12 is coated with a catalytic coating on the pore wall surface of the microporous structure by means of dip coating, spraying, etc. The catalytic coating includes a catalyst and an adhesive, so that the catalyst adheres to the surface of the microporous structure. Thus, the pollutants 200 adsorbed by the microporous structure can be catalytically degraded in a timely manner, preventing the accumulation of pollutants 200 from blocking the microporous structure.

[0112] In some embodiments, the surface of the purification channel structure 12 is at least partially coated with a catalytic coating, and the catalytic coating includes a catalyst and a binder, so that the pollutants 200 in the cooking fume gas entering the purification channel structure 12 can be catalytically degraded, further reducing the residual accumulation of the pollutants 200 and improving the catalytic degradation efficiency of the cooking fume gas.

[0113] In some embodiments, when there is a catalytic coating on the surface of the cooking purification device 10, the cooking purification device 10 of the air fryer is arranged close to the heating component 213. In this way, there is no need to add an additional heating module, and the heat energy conducted by the air thermal cycle in the cooking cavity 20 can be directly used for thermal catalysis to occur a catalytic oxidation reaction, catalytically degrade the pollutants in the cooking fume gas, improve the thermal catalysis efficiency, and achieve the effect of energy conservation and emission reduction. In addition, it is also possible to catalytically degrade the pollutants in the cooking fume gas in a timely manner during the cooking process, making the cooking purification device 10 easier to clean.

[0114] In some embodiments, the catalyst includes a noble metal element catalyst and / or a metal oxide catalyst, and the noble metal element catalyst and / or the metal oxide catalyst includes at least one of noble metal elements and transition metal elements. The catalysts of the above types have thermal catalytic effects and can oxidize and degrade cooking fume pollutants into carbon dioxide and water under high-temperature conditions to achieve the purpose of purifying the air.

[0115] In some embodiments, the noble metal elements include at least one of Pt, Rh, Pd, Au, and Ag. The noble metal elements of the above types can endow the catalyst with better thermal catalytic functions, enabling it to oxidize and degrade cooking fume pollutants into carbon dioxide and water under high-temperature aerobic conditions to achieve the purpose of purifying the air.

[0116] In some embodiments, the transition metal elements include at least one of Ce, Cu, Co, Fe, La, Mn, and Ni. The transition metal elements of the above types can endow the catalyst with better thermal catalytic functions, enabling it to oxidize and degrade cooking fume pollutants into carbon dioxide and water under high-temperature aerobic conditions to achieve the purpose of purifying the air.

[0117] In some embodiments, the catalyst includes CeO 2 , CuO, CoO, Co 3 O 4 , Fe 2 O 3 , Fe 3 O 4 , MnO 2 , Mn 2 O 3 , Mn 3 O 4 , NiO, LaMnx Co 1-x O 3 、 CuFe 2 O 4 、 CuMn 2 O 4 、 Cu 1.5 Mn 1.5 O 4 At least one of the above. Catalysts of the above types have good thermal catalytic effects and can oxidize and degrade cooking fume pollutants into carbon dioxide and water under high-temperature aerobic conditions, achieving the purpose of purifying the air.

[0118] In some embodiments, the catalyst includes a noble metal catalyst, and the mass percentage content of the noble metal catalyst in the catalyst is 1% - 5%. For example, it can be any value in the range of 1% - 5% such as 1%, 1.5%, 2%, 3%, 3.5%, 4%, 4.5%, 5%, etc.

[0119] In some embodiments, the catalyst includes a metal oxide catalyst, and the mass percentage content of the metal oxide in the catalyst is 10% - 60%. For example, it can be any value in the range of 10% - 60% such as 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, etc.

[0120] In some embodiments, the mass percentage content of the catalyst in the catalytic coating is 0.1% - 100%. For example, it can be any value in the range of 0.1% - 100% such as 0.1%, 10%, 20%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 70%, 75%, 80%, 85%, 90%, 95%, 98%, 99%, 99.5%, 99.9%, etc. Energizing the substrate can fully heat the catalyst, with a fast temperature rise and can maintain a stable temperature range for a long time. Therefore, when the mass percentage content of the catalyst in the catalytic coating is within the above range, it has a better oxidation and degradation effect on cooking fume pollutants.

[0121] This application does not limit the form of the catalyst. In some embodiments, the form of the catalyst includes granular, and the particle size range is 1 nm - 2 μm. It can be any value in the range of 1 nm - 2 μm such as 1 nm, 5 nm, 10 nm, 100 nm, 500 nm, 800 nm, 1000 nm, 1200 nm, 1500 nm, 1800 nm, 1900 nm, 2000 nm, etc. The catalyst at the micro-nano size has a large specific surface area, can expose more catalytic active sites, increase the contact area with cooking fume pollutants, and achieve the effect of rapidly oxidizing and degrading cooking fume pollutants.

[0122] In some embodiments, the catalytic coating further comprises a binder and / or a support.

[0123] The binder can enhance the adhesion between the catalyst and the substrate, reducing the risk that the catalyst powder falls off during long-term use, which may lead to a deterioration or even failure of the catalytic degradation effect. The present application does not limit the type of the binder, including organic binders and / or inorganic binders. In some embodiments, the binder comprises γ-Al 2 O 3 , SiO 2 , TiO 2 , ZrO 2 , molecular sieve, polyethersulfone, and polyamideimide, etc. At least one of the above types of binders can exhibit good viscosity even when used in small amounts. It can not only enhance the adhesion between the catalyst and the substrate, firmly fixing the catalyst on the surface of the substrate, but also increase the proportion of the catalyst in the catalytic coating, thereby enhancing the catalytic oxidation and degradation effect on cooking fume pollutants.

[0124] The support can support the catalyst, which is beneficial to expose a large number of catalytic active sites on the catalyst to the air, increasing the contact area with cooking fume pollutants and achieving the effect of rapid catalytic oxidation and degradation of cooking fume pollutants. The present application also does not limit the type of the support. In some embodiments, the support comprises a molecular sieve, and the molecular sieve comprises at least one of BETA5 molecular sieve, USY5 molecular sieve, and ZSM-5 molecular sieve. With the help of the above types of supports, the catalyst can expose a large number of catalytic active sites to the air, increasing the contact area with cooking fume pollutants and achieving the purpose of rapid catalytic oxidation and degradation of cooking fume pollutants.

[0125] In some embodiments, the cooking purification device 10 of the present application contains a conductive material and has an electrothermal effect. After being energized, the resistance of the substrate generates heat, which can directly heat the catalytic coating on the surface of the cooking purification device 10. The catalyst in the catalytic coating is also heated to its working temperature to obtain catalytic activity. The heating response in this process is fast, the energy efficiency is high, the catalytic coating and the catalyst are heated more uniformly, and it is not easy to form local hot spots or cold spots. Moreover, it can be maintained within the working temperature range of the catalyst for a long time, enabling the catalyst to maintain catalytic activity for a long time. Under the above conditions, the pollutant 200 contacts the active sites of the catalyst and is catalytically oxidized and degraded in an aerobic environment, thereby achieving the purpose of degrading pollutants, purifying the air, and extending the service life of the cooking purification device.

[0126] In some embodiments, the conductive material includes at least one of stainless steel, nickel-chromium alloy, PTC heating ceramic, SiC, cast iron, activated carbon, aluminum alloy, copper alloy, aluminum-plated material, and galvanized material. The above types of conductive materials have good electrical conductivity and good electrothermal effect. After power is turned on, they can quickly generate heat to heat up the cooking purification device 10, directly heat the catalytic coating, and heat the catalyst to the working temperature to stimulate the catalytic activity. The above working temperature can be maintained when power is turned on, so that the catalyst always maintains catalytic activity, and the cooking fume pollutants are promptly catalytically degraded in an aerobic environment. In addition, the above conductive materials are easy to clean and durable.

[0127] The cooking purification device 10 of the present application includes a conductive material. It can be understood that the cooking purification device 10 is made of a conductive material as a whole, or only partially made of a conductive material.

[0128] For example, the cooking purification device 10 is entirely made of conductive material, and the catalytic coating is coated on the surface of the conductive material. The conductive material generates heat when electricity is applied, and the catalyst is heated from inside the catalytic coating to its working temperature.

[0129] For another example, the surface layer of the cooking purification device 10 is made of conductive material to form a conductive layer, and then a catalytic coating is coated on the surface of the conductive layer. The conductive layer generates heat when energized, and the catalyst is heated to its working temperature from inside the catalytic coating.

[0130] For another example, the interior of the cooking purification device 10 is made of conductive material to obtain a conductive core, a heat-conducting layer is prepared on the surface of the conductive core, and then a catalytic coating is coated on the surface of the heat-conducting layer. The conductive core is energized to generate heat, and the heat is transferred to the catalytic coating on the surface of the substrate through the heat-conducting layer, and the catalyst is heated to its working temperature from the inside of the catalytic coating.

[0131] The technical solution of the present application is further described in detail below in conjunction with specific embodiments. It should be understood that the following specific embodiments are only used to explain the present application and are not used to limit the present application.

[0132] Example 1 to Example 5

[0133] Experimental object: Air fryer

[0134] The structures of the air fryers of Embodiments 1 to 5 are as follows: Figure 1 , Figure 2 and Figure 8 As shown, a cooking purification device 10 is connected to the air outlet of the air fryer.

[0135] Comparative Example 1

[0136] The structure of the air fryer in Comparative Example 1 is similar to that in Example 1, except that the cooking purification device 10 of the present application is not added to the air fryer in Comparative Example 1, and the cooking oil fume gas generated in the cooking cavity 20 is directly discharged into the air through the air outlet.

[0137] Comparative Examples 2 to 3

[0138] The structures of the air fryers in Comparative Examples 2 to 3 are similar to those in Example 1, but the purification channel structure 12 in the cooking purification device 10 is not designed with one end open and one end closed, but with both ends open.

[0139] Table 1 Performance Comparison of Air Fryers in Examples and Comparative Examples

[0140]

[0141] Performance Test

[0142] Add 100 g of edible peanut oil to the cooking cavities of the air fryers in the examples and comparative examples, and set them to work normally in the grilling mode; set a gas sampling probe at the air outlet of the air fryer, and use a VOC detector to continuously detect the VOC concentration at the air outlet. Set a wind speed probe at the air outlet of the air fryer to monitor the air flow rate at the air outlet of the air fryer. The test results are shown in Table 2.

[0143] Table 2 Performance Comparison of Air Fryers in Examples and Comparative Examples

[0144] Average VOC concentration (ppm) Purification rate (%) Air velocity (m / s) Example 1 200 90％ 9.5 Example 2 150 93％ 9.3 Example 3 20 99％ 8.2 Example 4 50 98％ 8.5 Example 5 20 99％ 8 Comparative example 1 2000 0％ 10 Comparative example 2 2000 0％ 9.8 Comparative example 3 2000 0％ 9.8

[0145] It can be seen from the test results that:

[0146] The air fryers in Examples 1 to 5 are installed with different types of cooking purification devices. The average VOC concentration at the air outlet is measured to be between 20 and 200 ppm, indicating that the wall-piercing filtration purification component in the cooking purification device plays a purification role, and the purification rate reaches 90% to 99%. At the same time, the wind speed is 8 to 9.5 m / s, indicating that the wall filtration purification component does not significantly hinder the air flow at the air outlet.

[0147] The air fryer in Comparative Example 1 is not installed with a cooking purification device, which is equivalent to a blank control. The average VOC concentration at the air outlet is measured to be 2000 ppm, and the average wind speed at the air outlet is 10 m / s, and the purification effect is poor.

[0148] The purification channel structure 12 in the cooking purification device 10 of Comparative Examples 2 and 3 is not designed with one end open and one end closed, but with both ends open. The cooking oil fume gas will directly pass through the channel structure 121 and be discharged, and it is difficult to intercept pollutants 200, which is likely to cause air pollution.

[0149] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A cooking purification device, characterized in that, the cooking purification device (10) includes: a main body part (11), at least one through opening (111) is formed on the main body part (11); and a purification pore structure (12), the purification pore structure (12) is connected to the main body part (11), and is provided with a purification pore (121) communicated with the through opening (111), one end of the purification pore (121) far away from the through opening (111) is closed, at least part of the purification pore structure (12) is a microporous structure, and the microporous structure communicates with the through opening (111).

2. The cooking purification device according to claim 1, characterized in that, a plurality of the purification pore structures (12) are arranged in parallel.

3. The cooking purification device according to claim 1 or 2, characterized in that, the purification pore structure (12) is loaded with a catalyst; and / or, at least part of the surface of the purification pore structure (12) is coated with a catalytic coating, and the catalytic coating includes a catalyst; and / or, the inner wall surface of the pores of the microporous structure is coated with a catalytic coating.

4. The cooking purification device according to claim 1, characterized in that, the purification pore structure (12) includes a side wall (122) and a bottom wall (123), and the side wall (122) and the bottom wall (123) enclose to form the purification pore (121).

5. The cooking purification device according to claim 4, characterized in that, the side wall (122) is provided with the microporous structure; and / or, the bottom wall (123) is provided with the microporous structure.

6. The cooking purification device according to claim 4, characterized in that, the side wall (122) is provided with the microporous structure, and the bottom wall (123) is a baffle structure; and / or, the bottom wall (123) is provided with the microporous structure, and the side wall (122) is a baffle structure.

7. The cooking purification device according to claim 6, characterized in that, the bottom wall (123) is an arc-shaped structure, or the bottom wall (123) is a straight plate-shaped structure.

8. The cooking purification device according to claim 1, characterized in that, the purification pore structure (12) is made of a high-temperature resistant material, including at least one of ceramics, metals and polymer materials.

9. The cooking purification device according to claim 8, characterized in that, the ceramics include at least one of cordierite, silicon carbide, kaolin, alumina, silica; and / or, the metals include at least one of aluminum, titanium, nickel, copper, stainless steel.

10. The cooking purification device according to claim 1, characterized in that, the porosity of the microporous structure is 10% - 80%; and / or, the average pore diameter of the microporous structure is 1μm - 1000μm.

11. The cooking purification device according to claim 10, characterized in that, the porosity of the microporous structure is 20% - 30%; and / or, the average pore diameter of the microporous structure is 200μm - 300μm.

12. The cooking purification device according to claim 1, characterized in that, The radial average diameter of the purification channel (121) is 0.1 mm to 100 mm; and / or, the wall thickness of the purification channel structure (12) is 10 μm to 20,000 μm.

13. The cooking purification device according to claim 12, characterized in that the radial average diameter of the purification channel (121) is 0.5 mm to 10 mm; and / or, the wall thickness of the purification channel structure is 100 μm to 500 μm.

14. The cooking purification device according to claim 12, characterized in that the ratio of the radial average diameter of the purification channel to the wall thickness of the purification channel structure is 1 to 100.

15. The cooking purification device according to any one of claims 1 to 14, characterized in that the cooking purification device (10) includes a housing (13), an air passage (131) is formed in the housing (13), the main body part (11) is connected to the housing (13), and the purification channel structure (12) is arranged in the air passage (131).

16. The cooking purification device according to claim 15, characterized in that the cooking purification device includes a fan (14), and the fan (14) is arranged in the air passage (131); and / or, the main body part (11) is detachably connected to the housing (13); and / or, the purification channel structure (12) is detachably connected to the main body part (11).

17. A cooking appliance, characterized in that the cooking appliance (100) includes a cooking cavity (20) and the cooking purification device (10) according to any one of claims 1 to 15, an air outlet is provided in the cooking cavity (20), and the air outlet is communicated with the inlet (111) of the cooking purification device (10).

18. The cooking appliance according to claim 17, characterized in that the cooking appliance (100) includes an exhaust port, and the exhaust port is communicated with the air passage (131) of the cooking purification device (10).

19. The cooking appliance according to claim 17, characterized in that the cooking appliance (100) includes an air fryer, an electric oven, a pancake griddle or a griddle.

20. The cooking appliance according to claim 19, characterized in that the cooking appliance (100) is an air fryer, a heat convection module (21) is contained in the cooking cavity (20), and the heat convection module includes a drive motor (211), a wind impeller (212) and a heating component (213).

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